The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2004
Filed:
Jan. 03, 2003
William Everett Wears, Marshalltown, IA (US);
Lynn Dean Mahncke, Marshalltown, IA (US);
Fisher Controls International LLC, St. Louis, MO (US);
Abstract
An improved seat ring, valve body, and seat ring valve assembly have self-aligning characteristics that reduce leakage without the need for an unacceptably high level of assembly torque. The seat ring includes at least one annular thrust bearing surface rim for receiving a valve plug to open and close the valve. The seat ring further includes threads positioned on its exterior surface for mating with threads in the valve body to provide a secondary seal of the seat ring. In order to prevent unacceptable leakage, a point of contact is provided to seat on an angled body contact surface of the valve to form a superior primary contact seal. The seat ring valve assembly reduces torque requirements, properly aligns the seat ring within the cavity, and reduces leakage.